Does this happen during the metadata parsing? If so, yes, it is quite resource intensive, especially when you have some large repositories enabled. There is a C metadata parser that is available from the yum site, that is much faster and lighter. But it requires yum 2.6.2.
Yes Daniel, it happens especially during the metadata parsing. The trouble is yum is in version 2.4.3. The C metadata parser sounds great. I'll try it in future Yum versions.
I'm not a developer but anybody knows that C is great language in terms of performance.
¿Is Yum written totally in Python or I'm wrong?